Which of the following statements is not true regarding an expression written in scientific notation in teh form of a x 10^n?
a. the value of a must be greater or = to 1 and smaller than 10
b. thh value of n must be an integer
c. doubling n results in a doubling of the value of the expression
d. doubling a results in a doubling of the value of the expression

The best and most correct answer among the choices provided by your question is the third choice or letter C which states that " Doubling n results in a doubling of the value of the expression."

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1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post